Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae6d13263e76e69…

MALICIOUS

PDF

41.3 KB Created: 2020-08-30 14:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25c3b697c065deab0d3558977da14a6f SHA-1: fd3735b95c9bbf3ac64963a6634990a70379490f SHA-256: dae6d13263e76e69101c7b3cc722a896fdcf50332e9bc93bd1dec3bd99d1918d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a redirector URL, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. The document body and embedded links suggest a lure for downloading software, likely to deliver a secondary payload. No scripts were extracted, limiting the analysis of direct execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wix?keyword=abbyy+pdf+transformer+full+download
    • https://static.usrfiles.com/ugd/b8c837_7a632ee9836d48e6bec1a7a2dcf40888.pdf
    • https://static.usrfiles.com/ugd/269bb8_6f53de3cab86454ba8f102de43d29e52.pdf
    • https://static.usrfiles.com/ugd/b8c837_d37be3c9b1844d1d804466bb191d401b.pdf
    • https://static.usrfiles.com/ugd/b8c837_0967af2e8c2f4fe1be14fb66a120b285.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/dotevafepumiki.pdf
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/43263595170.pdf
    • https://static.usrfiles.com/ugd/837d34_5ccedf20420a4e7c84b18c4090e7a137.pdf
    • https://static.usrfiles.com/ugd/34ec99_41f2ed8d1997414492fce9b1b385e3c0.pdf
    • https://static.usrfiles.com/ugd/05900a_6b3ccc27539c4cd891e3633456be6175.pdf
    • https://static.usrfiles.com/ugd/b8c837_98b8e68f9a124837b2e32dd7f6625552.pdf
    • https://static.usrfiles.com/ugd/ecec20_072a22068dcc4385ad9f084cd613f4c9.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepudanunakadop.pdf
    • https://cdn.shopify.com/s/files/1/0429/4728/1062/files/puwiwetubomofexo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/zolodawisefuzujowelipuwo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000546e.bin
a0746d100e3ae1be0a6505c89134a5d262af6187cb3fdac42b601f5e908e346f
pdf-font-stream PDF embedded font (sfnt) at offset 0x546E 5344 bytes
font_01_sfnt_off00006689.bin
464fba17ab3ee954af4fbafc31408f281dc534a9c26cb469d32075d0fdcd5df7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6689 10392 bytes
font_02_sfnt_off00008a19.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A19 4324 bytes